此错误表明 DispatchGroup 中的线程提前离开或未离开。希望一些资深的 iOS Swift 开发者可以对此提出想法
我处理这个问题的方法是检查每个 DispatchGroup 并检查是否可以缩小错误: - 这已经是几年的错误了 - 问题是堆栈跟踪没有找到崩溃发生的地方 我想错误在这里:
Legacy Code:
let group = DispatchGroup()
group.enter()
DispatchQueue.walletQueue.async {
if self.walletManager.signTransaction(tx, pin: pin) {
self.publish(completion: completion)
success = true
}
group.leave()
}
let result = group.wait(timeout: .now() + 30.0)
if result == .timedOut {
...
vs.
Proposed Code:
let group = DispatchGroup()
group.enter()
DispatchQueue.walletQueue.async {
if self.walletManager.signTransaction(tx, pin: pin) {
self.publish(completion: completion)
success = true
group.leave()
} else {
didSignTransaction = false
group.leave()
}
}
let result = group.wait(timeout: .now() + 30.0)
if result == .timedOut {
...
```
Date/Time: 2020-01-11 14:25:01.5722 +0100
Launch Time: 2020-01-11 14:12:54.0779 +0100
OS Version: iPhone OS 13.3 (17C54)
Release Type: User
Baseband Version: 5.30.01
Report Version: 104
Exception Type: EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000001, 0x00000001949ae500
Termination Signal: Trace/BPT trap: 5
Termination Reason: Namespace SIGNAL, Code 0x5
Terminating Process: exc handler [2913]
Triggered by Thread: 0
Thread 0 name:
Thread 0 Crashed:
0 libdispatch.dylib 0x00000001949ae500 dispatch_group_leave$VARIANT$armv81.cold.1 + 36
1 libdispatch.dylib 0x00000001949796a8 dispatch_group_leave$VARIANT$armv81 + 112 (semaphore.c:303)
2 Litewallet 0x0000000104a72e3c thunk for @escaping @callee_guaranteed () -> () + 28 (<compiler-generated>:0)
3 libdispatch.dylib 0x00000001949a6610 _dispatch_call_block_and_release + 24 (init.c:1408)
4 libdispatch.dylib 0x00000001949a7184 _dispatch_client_callout + 16 (object.m:495)
5 libdispatch.dylib 0x000000019498a34c _dispatch_main_queue_callback_4CF$VARIANT$armv81 + 996 (inline_internal.h:2484)
6 CoreFoundation 0x0000000194c585e4 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 12 (CFRunLoop.c:1749)
7 CoreFoundation 0x0000000194c535d8 __CFRunLoopRun + 2004 (CFRunLoop.c:3069)
8 CoreFoundation 0x0000000194c52adc CFRunLoopRunSpecific + 464 (CFRunLoop.c:3192)
9 GraphicsServices 0x000000019ebd8328 GSEventRunModal + 104 (GSEvent.c:2246)
10 UIKitCore 0x0000000198d4dae0 UIApplicationMain + 1936 (UIApplication.m:4773)
11 Litewallet 0x0000000104a5e308 main + 68 (BuyTableViewController.swift:31)
12 libdyld.dylib 0x0000000194adc360 start + 4
Thread 1 name:
Thread 1:
0 libsystem_kernel.dylib 0x0000000194ab0634 mach_msg_trap + 8
1 libsystem_kernel.dylib 0x0000000194aafaa0 mach_msg + 72 (mach_msg.c:103)
2 CoreFoundation 0x0000000194c58288 __CFRunLoopServiceMachPort + 216 (CFRunLoop.c:2575)
3 CoreFoundation 0x0000000194c533a8 __CFRunLoopRun + 1444 (CFRunLoop.c:2931)
4 CoreFoundation 0x0000000194c52adc CFRunLoopRunSpecific + 464 (CFRunLoop.c:3192)
5 Foundation 0x0000000194f927f4 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 228 (NSRunLoop.m:374)
6 Foundation 0x0000000194f926d4 -[NSRunLoop(NSRunLoop) runUntilDate:] + 88 (NSRunLoop.m:421)
7 UIKitCore 0x0000000198de6204 -[UIEventFetcher threadMain] + 152 (UIEventFetcher.m:637)
8 Foundation 0x00000001950c30a4 __NSThread__start__ + 848 (NSThread.m:724)
9 libsystem_pthread.dylib 0x00000001949f5d8c _pthread_start + 156 (pthread.c:896)
10 libsystem_pthread.dylib 0x00000001949f976c thread_start + 8
Thread 2:
0 libsystem_pthread.dylib 0x00000001949f9758 start_wqthread + 0
Thread 3:
0 libsystem_pthread.dylib 0x00000001949f9758 start_wqthread + 0
Thread 4:
0 libsystem_pthread.dylib 0x00000001949f9758 start_wqthread + 0
Thread 5:
0 libsystem_pthread.dylib 0x00000001949f9758 start_wqthread + 0
Thread 6 name:
Thread 6:
0 libsystem_kernel.dylib 0x0000000194ab0634 mach_msg_trap + 8
1 libsystem_kernel.dylib 0x0000000194aafaa0 mach_msg + 72 (mach_msg.c:103)
2 CoreFoundation 0x0000000194c58288 __CFRunLoopServiceMachPort + 216 (CFRunLoop.c:2575)
3 CoreFoundation 0x0000000194c533a8 __CFRunLoopRun + 1444 (CFRunLoop.c:2931)
4 CoreFoundation 0x0000000194c52adc CFRunLoopRunSpecific + 464 (CFRunLoop.c:3192)
5 CFNetwork 0x0000000197f094e8 -[__CoreSchedulingSetRunnable runForever] + 192 (CoreSchedulingSet.mm:1372)
6 Foundation 0x00000001950c30a4 __NSThread__start__ + 848 (NSThread.m:724)
7 libsystem_pthread.dylib 0x00000001949f5d8c _pthread_start + 156 (pthread.c:896)
8 libsystem_pthread.dylib 0x00000001949f976c thread_start + 8
Thread 7:
0 libsystem_pthread.dylib 0x00000001949f9758 start_wqthread + 0
Thread 0 crashed with ARM Thread State (64-bit):
x0: 0x0000000000000000 x1: 0x0000000000000002 x2: 0x0000000000000002 x3: 0x00000001949c26e8
x4: 0x0000001400000002 x5: 0x0000001600000002 x6: 0x0000000000000003 x7: 0x0000000000000680
x8: 0x0000000000000000 x9: 0x0000000000000004 x10: 0x0000000000000000 x11: 0x0000000200000002
x12: 0x0000000000000100 x13: 0x0000000093a0792e x14: 0x0000000093c08000 x15: 0x0000000000000010
x16: 0x0000000194979638 x17: 0x0000000013c00000 x18: 0x0000000000000000 x19: 0x0000000104ac651c
x20: 0x0000000281b70140 x21: 0x0000000280e8f740 x22: 0x0000000280e803c0 x23: 0x0000000000000000
x24: 0x0000000002ffffff x25: 0x0000000280e80600 x26: 0x00000001050718e0 x27: 0x00000000000020ff
x28: 0x0000000000000114 fp: 0x000000016b3a6ac0 lr: 0x00000001949796a8
sp: 0x000000016b3a6ac0 pc: 0x00000001949ae500 cpsr: 0x00000000
esr: 0xf2000001 Address size fault
```
最佳答案
如果不深入研究源代码，很难查明崩溃的确切原因，但上面的堆栈跟踪引用了 BuyTableViewController.swift:31。
我会使用 breakpoints查明原因，从 BuyTableViewController.swift 中的第 31 行开始作为崩溃的来源。
关于ios - 需要修复崩溃 : thunk for @escaping @callee_guaranteed () -> () + 28 (<compiler-generated>:0) 的错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/59722937/